Electric Guitar and Bass amp

So I'm flat broke, trying to get money for a guitar, but I haven't the money, nor the room for that matter to be getting a guitar amp. I have a very awesome bass amp going, an SWR Studio 220 into a Goliath II, the bass tones I get are beautiful. SO when its time to get a guitar and play through that low-end loving beast, how do i make the amp sound more guitar-like, less bass amp sounding? Help?

Roll off a LOT of lows for starters, and watch out for that tweeter. It wouldn't hurt to use a guitar pre in front of that, or an appropriate OD/DIST box. Then start playing with the lower and upper mids EQ til you get in the ballpark of the sounds you think you need.